As their U.S. allies watched, the Kurdish peshmerga fighters were run out of Kirkuk and all the territory they had captured fighting ISIS alongside the Americans. The Iraqi army that ran them out was trained and armed by the United States.

The U.S. had warned the Kurds against holding the referendum on independence on Sept. 25, which carried with 92 percent. Iran and Turkey had warned against an independent Kurdistan that could be a magnet for Kurdish minorities in their own countries.

But the Iraqi Kurds went ahead. Now they have lost Kirkuk and its oil, and their dream of independence is all but dead.

More troubling for America is the new reality revealed by the rout of the peshmerga. Iraq, which George W. Bush and the neocons were going to fashion into a pro-Western democracy and American ally, appears to be as close to Iran as it is to the United States.

After 4,500 U.S. dead, scores of thousands wounded and a trillion dollars sunk, our 15-year war in Iraq could end with a Shiite-dominated Baghdad aligned with Tehran.